What medicine can i take to abort pregnancy ?

Please doctor, i am an unmarried girl , i am pregnant and already 7 weeks now, i have got the medicine mifeprin 3 tabs and misoprostol 2 tabs to use on the third day. How do i take these medicine to abort the pregnancy . I have consulted a gynecologist and he did a vaginal ultra sound scan and told me that i have only an empty sac. he says either it is a miscarriage or wrong dates. I have seen the tiny bean shaped sac inside my womb. i am alone and i do not have enough strength to take care of my self so i want to take the medicine and after a week go and make another scan to see if the pregnancy has terminated completely. Can you explain me how to take medicine orally? and what the dosages are? as i have 5 tabs all together.... can you explain me the complications i might have to face. i am doing this because i do not have any other choice and in my country abortion is illegal. please help me! please!